Department of Mechanics, School of Mechanical Engineering, Tianjin University
本文采用基于APDL(ANSYS parametric design language)命令流开发的参数化建模方法,建立了某型号复合式盾构机刀盘的数字模型。对刀盘施加极限工况下的推力和扭矩,通过静力学分析得到了刀盘的应力分布和变形分布,确定了最大应力和最大变形位置,校核了刀盘的静强度和静刚度。进一步以刀盘总质量为优化目标,以刀盘强度和刚度为约束条件建立了基于参数化建模的刀盘结构优化方法,提出了刀盘结构优化流程。通过参数敏感性分析确定了刀盘优化参数,探究了相关参数对刀盘强度和刚度的影响。对本文研究的复合式盾构机刀盘的关键参数进行优化。结果表明:优化后刀盘的最大应力降低了12%,最大变形降低了20%,质量减轻了119 kg。因此,基于参数化建模的优化方法可以提供刀盘的强度与刚度,并同时降低刀盘质量。相关研究可为后续多目标刀盘结构优化提供参考。
In this paper, a parameterized modeling method based on the APDL (ANSYS parametric design language) command flow is adopted to establish a digital model of a certain type of composite shield machine cutterhead. By applying the ultimate thrust and torque to the cutterhead, the stress and deformation distributions are obtained through a finite element analysis, and the positions where experience maximum stress and displacement are identified. In doing so, the strength and stiffness conditions are validated as well. In addition, a parameterized modeling based optimization method for cutterheads is established by incorporating with the overall mass of the cutterhead as the optimization objective and the strength and stiffness of as constraints, and the corresponding optimization process is proposed. The optimization parameters of the cutterhead are determined through parameter sensitivity analysis, and the influence of relevant parameters on the strength and stiffness of the cutterhead is explored. The key parameters of the composite shield machine cutterhead studied in this article are optimized. After optimization, the maximum stress of the cutterhead, the maximum deformation and the total weight are reduced by 12%, 20%, and 119 kg, respectively. As a result, the proposed optimization method based on parameterized modeling can improve the strength and stiffness of the cutterhead while reducing the quality of the cutterhead. It is expected that this study can shed light on the optimization of multi-objective cutterhead structure.
刘洋. 基于参数化建模方法的复合式盾构机刀盘力学性能分析与结构优化[J]. 科学技术与工程, , ():复制